This communication is a general review of Eumolpinae, a subfamily of Chrysomelidae. The subfamily includes more than 7000 species. It is specially numerous and much diversified in the tropics, with both the attributes declining northward. It has several distinctive features, and is clearly related to Clytrinae, Cryptocephalinae, Chlamisinae, Lamprosomatinae, Hispinae, and Cassidinae. Megascelidines, though generally treated as a subfamily, they should be taken as a part of Eumolpinae. Through some larval features, Eumolpinae seem related also to Galerucinae-Chrysomelinae. Separation from Eumolpinae of the primitive eumolpines, the Tribe Spilopyrini, and inclusion of Syneta among Eumolpinae have been contradicted.